mahendra
Forum Guru
Topics: 173
Posts: 419
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A family is referred to a genetic specialist because of mild mental
retardation in several of the school-age children. Laboratory
evaluation demonstrates a specific chromosomal breakage site in
metaphase studies of lymphocytes cultured with methotrexate.
Which of the following chromosomes is most likely to be specifically
affected?
A. X
B. Y
C. 13
D. 16
E. 21
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| meg
Forum Guru
Topics: 62
Posts: 806
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sounds like fragile X , so A
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